Shaft arrangement for a transmission

Abstract

A shaft arrangement for a transmission comprises a shaft having an axial bore into which oil can be introduced via an oil supply system, at least one loose wheel which is rotatably supported on the shaft via a bearing, and a shift clutch arrangement which is arranged for connecting the loose wheel with the shaft in a rotationally fixed manner. The shift clutch arrangement comprises a guide sleeve which is connected with the shaft via a tooth engagement in a rotationally fixed manner. The axial bore is connected via at least one transversal bore with the outer circumference of the shaft, so as to supply oil to the bearing and to the shift clutch arrangement. The transversal bore is arranged in an area of the tooth engagement between the guide sleeve and the shaft. A channel is provided in at least one of an area of a toothing of the guide sleeve and an area of the toothing of the shaft, which, together with the guide sleeve toothing, forms the tooth engagement. The channel connects the transversal bore with an area between the guide sleeve and the bearing.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the priority of German utility model application DE 20 2009 003 671.5, filed Mar. 17, 2009.BACKGROUND OF THE INVENTION[0002]The present invention relates to a shaft arrangement for a transmission, particularly for motor vehicles, comprising a shaft having an axial bore into which oil can be introduced via an oil supply system, at least one loose wheel which is rotatably supported on the shaft via a bearing, and a shift clutch arrangement which is arranged for connecting the loose wheel with the shaft in a rotationally fixed manner, said shift clutch arrangement comprising a guide sleeve which is connected with the shaft via tooth engagement in a rotationally fixed manner, wherein the axial bore is connected via at least one transversal bore with the outer circumference of the shaft, so as to supply oil to the bearing and to the shift clutch arrangement, wherein the transversal bore is arranged in an area of the too...

AI Technical Summary

Benefits of technology

[0007]Against this background, it is the object of the invention to provide an improved shaft arrangement that ensures a sufficient oil supply of the bearing and the shift clutch arrangement and that induces lower drag losses.

[0012]According to the invention, it is further advantageous that a bearing bush which is typically provided between the bearing and the shaft, can be manufactured in a cost-efficient manner. While it was necessary in the prior art, where the transversal bore leads into the bearing, to provide corresponding bores and / ore radial recesses in the bearing bush, this is no longer necessary with the inventive shaft arrangement. The bearing bush which is optionally used in connection with the bearing, thus, has preferably no transversal bores.

[0021]Here, it is possible to manufacture the axial channel without influence on the guide sleeve toothing.

[0030]Here, it is possible to assemble the guide sleeve on the shaft essentially without angularly aligning these components with each other. It is particularly preferred if the radial recess extends via the entire inner circumference of the guide sleeve. In this embodiment, the guide sleeve can be mounted to the shaft without having to angularly align the guide sleeve with the shaft at all.

[0039]Thus, the toothing quality of the shaft toothing can be maintained at a high level. For instance, the bores can be displaced by 180°, and the toothing can be manufactured in a non-cutting manner by cold-rolling or rolling.

Problems solved by technology

Conclusively, the constructive effort for supplying the bearings and the shift clutch arrangement is relatively high.

Here, the constructive effort for supplying the bearing and the shift clutch with oil is relatively low.

However, it is disadvantageous that the bearing is flooded during the oil supply, which leads to a high increase of the drag moment, which is due to the tumbling work of the roller bodies.

This leads to a degradation of the efficiency of the shaft arrangement, and, thus, of the transmission.

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